No-Dong-A1, Shahab-3B Technical Data
By (c) Charles P. Vick, 2004-7, ALL RIGHTS RESERVED
March 23, 2007
The opinions and evaluations stated here in are only the authors and cannot be construed to reflect those of any Government agency, company, institute or association. It is based on public information, circumstantial evidence, informed speculation, declassified U.S. intelligence community documents, official Iranian and North Korean government documents and histories, oral histories, interviews and reverse engineering analysis. As with all data regarding the Iranian and North Korean strategic space and ballistic missile programs, this analysis is subject to revision--and represents a work in progress.
|Design Bureau OKB||Makayev heritage|
|Engine OKB||Isayev (KBKhM) heritage, open cycle operation|
|Engine Designation||Scud heritage?|
|CEP (m)||190* (1)|
|Height (m)||15.895-16 * (13.4 no warhead)|
|Span across fins (m)||~ 2.74|
|L. W. (kg)||~19,022. **|
|Stage Mass (kg)||~18,372. **|
|D. W. (kg)||~2,180.-2,208. **|
|Guidance||Inertial with GPS input|
|Thrust (kg f)||Effective 31,702. up rated* **** Actual 32,263 up rated*|
|Thrust/Weight =Launch gee's||1.67|
|Steering||Four rotating vanes in the exhaust gas jet. (-4 to -5 sec. Isp. Loss) (3)|
|Burn Time (sec.)||115.23 **|
|Flight Time (sec.)|
|Cut Off Velocity (m/sec.)||~4,900-5,100|
|Isp. (sec.)||Effective 226 - SL*** (3)
Actual 230 -SL
Effective 264 -vac.*** (4)
20% Gasoline, 80% Kerosene
27% N2O4 + 73% HNO3 with Iodium inhibitor
Nitrogen Tetroxide & Nitric Acid
|Mass Prop. (kg)||~16,164.**|
|HE Nuclear Warhead (kg)||650-500|
|Warhead (kg)||500-650* (All types)|
|Warhead length (m)||2.6|
* All of the No-dong performance data came from Iran and Pakistan data and the North Korean Taep'o dong-1 released publicly has allowed a more through analysis of the actual missile performance.
** Based on comparative Russian data and rocket equations derived analysis results.
*** Known propellant performance and details.
**** Up rated to Taep'o dong-1 thrust performance with a lengthened burn time and reduced payload mass. The several flight test of Shahab-3B constitute the flight test
of the first stage of the multi-stage Shahab-4 improved Taep'o dong-1, These were the final test of the Shahab-3b before its deployment with Iran's first operational nuclear warhead.
SL - Sea Level, Vac. Vacuum, Isp. Specific Impulse
1. Not accepted. Expected to be several 1,000 meters until Aug. 2004 introduction of Inertial GPS support input based guidance package with Chinese help.
2. Also based on other referenced information and discussions.
3. Due to vanes steering drag, Loss of 4-5 sec.
4. Losses at altitude amounting to perhaps 3-4 sec. vac.
Iran has introduced a third generation re-entry vehicle (RV) for the advanced Shahab-3 series that falls exactly between the cone shaped Shahab-3A design and the four-conic Shahab-3B, 3C design. Its design variation introduces a longer cone design with a short cylindrical base design foreshortening the original cone design but matching the Tri-conic base flared skirt base diameter design. It therefore has a larger volume for a nuclear device design believed to be in development in Iran which is better than the four-conic configuration. It may also resemble the Shahab-4, No-dong-B RV design.
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